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Finding the Fourth Proportional to 644,555.52, 889,509.84 and 372,708.72

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Solution

The fourth proportional to 644,555.52, 889,509.84 and 372,708.72 is: 514,351.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,555.52 : 889,509.84 = 372,708.72 : x
  2. Step 2: Convert to fraction form
    644,555.52/889,509.84 = 372,708.72/x
  3. Step 3: Cross multiply
    644,555.52x = 889,509.84 × 372,708.72
  4. Step 4: Simplify right side
    644,555.52x = 331,528,073,893.81
  5. Step 5: Solve for x
    x = 331,528,073,893.81/644,555.52
  6. Step 6: Final answer
    x = 514,351.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.